What is CVE-2026-21103?

CVE-2026-21103 is a medium-severity vulnerability in Samsung Android, classified under Path Traversal: '.../...//'. CVSS score: 6.1/10. Published 2026-09-09.

How severe is CVE-2026-21103?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Path Traversal in Samsung Android

CVE-2026-21103

Path traversal in GalaxyDiagnostics prior to SMR Sep-2026 Release 1 allows physical attackers to access files with system privilege.

Published 2026-09-09 · last modified 2026-09-10.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.002 (6.9th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Samsung Android — versions 14.0, 15.0, 16.0

Weakness classification (CWE)

CWE-35 — Path Traversal: '.../...//'

References

security.samsungmobile.com/securityUpdate.smsb (Vendor Advisory)

Frequently asked questions

What is CVE-2026-21103?: CVE-2026-21103 is a medium-severity vulnerability in Samsung Android, classified under Path Traversal: '.../...//'. CVSS score: 6.1/10. Published 2026-09-09.
How severe is CVE-2026-21103?: Medium severity. CVSS v3 base score is 6.1 out of 10.